It is, as Arsène Wenger might say, "money time". For all the intrigue of the group stages, it is generally from the quarter-finals on that the players who define tournaments take command.
Consider how, in the last quarter-final, Andrea Pirlo obliterated Steven Gerrard's claims to be considered among the best midfielders in the competition. The Italian and Cristiano Ronaldo of Portugal have been the most eye-catching players of Euro 2012.
But there can be no denying that Mesut Ozil has been just as influential. The performance level of the German No 8 escalated again in the quarter-final against Greece. Not only did he epitomise the team with his lightning runs between the lines, he generally ran the show. He has directly assisted a third of Germany's nine goals.
The fact that Ozil has not scored, though, isn't the only difference between himself and Pirlo and Ronaldo. Ozil does not have the same cult of personality around him. Ozil, however, has come to define Germany's tournament. He drives them from within, in an understated but overwhelming manner.
"The team supported me excellently on the pitch against Greece so I could really deliver," Ozil said. "I was immensely happy to show what I can do at last. Being voted man of the match is a side issue. We just have to function as a team. "
When Ozil was asked if he was "Germany's Pirlo", the playmaker sidestepped the question. "It's not Ozil against Italy," he said, of the semi-final. "It's Germany against Italy. Everyone works hard for each other and if we show what we can do, Italy will have a hard time. Italy have probably been the surprise package of the tournament. They are very strong, superbly organised... but if we play to our full potential we will come out winners."
Germany radiate confidence, but there is a respectful realism about them. As Ozil says: "We have the right self-confidence." He allowed himself one moment of individualist indulgence, however. "Generally, I'm content with my performances so far," he said. "I will demonstrate against Italy that I can put my foot on the accelerator."